Brand:

Toyota

Model Name:

4Runner GRN210 215 UZN210 215

Manual:

Repair Manual

Section:

1Gr-Fe Engine Control System

Title:

Sfi System

  1. Description

  2. Monitor description

  3. Monitor strategy

  4. Typical enabling conditions

  5. Typical malfunction thresholds

  6. Wiring diagram

  7. Inspection procedure

  8. Check ecm terminal voltage

  9. Check harness and connector (vvt sensor - ecm)

  10. Check vvt sensor (sensor power source)

  11. Check sensor installation (vvt sensor)

  12. Check camshaft timing gear assembly (teeth of plate)

DTC P0340 Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor)

DTC P0342 Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor)

DTC P0343 Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor)

DTC P0345 Camshaft Position Sensor "A" Circuit (Bank 2)

DTC P0347 Camshaft Position Sensor "A" Circuit Low Input (Bank 2)

DTC P0348 Camshaft Position Sensor "A" Circuit High Input (Bank 2)


​

DESCRIPTION

The variable valve timing (VVT) sensor (VV signal) consists of a magnet, iron core and pickup coil.
The VV signal plate has 3 teeth on its outer circumference and is installed on the camshaft timing pulley.
When the camshafts rotate, the protrusion on the signal plate and the air gap on the pickup coil change, causing fluctuations in the magnetic field and generating a voltage in the pickup coil.
This sensor monitors a timing rotor located on the camshaft and is used to detect a camshaft angle by the ECM. The camshaft rotation synchronizes with the crankshaft rotation, and this sensor communicates the rotation of the camshaft timing rotor as a pulse signal to the ECM. Based on the signal, the ECM controls fuel injection time and ignition timing.

DTC No.
DTC Detection Conditions
Trouble Areas
P0340
P0345
  1. Input voltage to ECM remains 0.3 V or less, or 4.7 V or higher for more than 5 seconds, when 2 or more seconds have elapsed after turning the ignition switch ON (2 trip detection logic)
  2. No VVT sensor signal to ECM during cranking (1 trip detection logic)
  1. Open or short in VVT sensor circuit
  2. VVT sensor
  3. Camshaft timing pulley
  4. Jumped tooth of timing chain
  5. ECM
P0342
P0347
Output voltage of VVT sensor is 0.3 V or less for 5 seconds (1 trip detection logic)
  1. Open or short in VVT sensor circuit
  2. VVT sensor
  3. Camshaft timing pulley
  4. Jumped tooth of timing chain
  5. ECM
P0343
P0348
Output voltage of VVT sensor is 4.7 V or more for 5 seconds (1 trip detection logic)
  1. Open or short in VVT sensor circuit
  2. VVT sensor
  3. Camshaft timing pulley
  4. Jumped tooth of timing chain
  5. ECM
Reference: Inspection using an oscilloscope
The correct waveform is shown on the illustration. 4Runner
HINT:
  1. The correct waveform is shown on the illustration.
  2. VV1+ and VV2+ stands for the VVT sensor signal, and NE+ stands for the CKP sensor signal.
    Items
    		Contents
    Terminals
    		NE+ - NE-
    VV1+ - VV1-
    VV2+ - VV2-
    Equipment Settings
    		5V/Division, 20ms/Division
    Conditions
    		Cranking or idling

MONITOR DESCRIPTION

If there is no signal from the VVT sensor even though the engine is turning, or if the rotation of the camshaft and crankshaft is not synchronized, the ECM interprets this as a malfunction of the sensor.

MONITOR STRATEGY


Related DTCs
P0340: Camshaft position sensor range check
P0340: Camshaft position/crankshaft position misalignment
P0340: Camshaft position sensor range check (Chattering)
P0342: Camshaft position sensor range check (Low voltage)
P0343: Camshaft position sensor range check (High voltage)
P0345: VVT sensor range check (While starting engine)
P0345: VVT sensor range check (After starting engine)
P0345: VVT sensor range check (Chattering)
P0347: VVT sensor range check (Low voltage)
P0348: VVT sensor range check (High voltage)
Required Sensors / Components (Main)
VVT sensor, Camshaft position sensor
Required Sensors / Components (Related)
Crankshaft position sensor
Frequency of Operation
Continuous
Duration
4 seconds:
P0340 (Camshaft position sensor range check), P0345 (VVT sensor range check (While starting engine))
5 seconds:
Others
MIL Operation
2 driving cycles:
P0340 (Camshaft position sensor range check), P0345 (VVT sensor range check (While starting engine))
Immediate:
Others
Sequence of Operation
None

TYPICAL ENABLING CONDITIONS


All:
The monitor will run whenever these DTCs are not present
None

Camshaft Position Sensor Range Check:
Starter
ON and not starter ON again
Minimal battery voltage while starter ON
Less than 11 V

Camshaft Position/Crankshaft Position Misalignment:
Engine RPM
600 rpm or more
Starter
OFF

Camshaft Position Sensor Range Check (Chattering, Low voltage, High voltage):
Starter
OFF
Ignition switch ON and time after ignition switch is OFF to ON
2 seconds or more

VVT sensor range check (While starting engine):
Starter
ON
Battery voltage while starter ON once at least
Less than 11 V

VVT sensor range check (After starting engine):
Engine RPM
600 rpm or more
Starter
OFF
Battery voltage
8 V or more
Ignition switch
ON

VVT sensor range check (Chattering, Low voltage, High voltage):
Starter
OFF
Ignition switch ON and time after ignition switch is OFF to ON
2 seconds or more
Battery voltage
8 V or more

TYPICAL MALFUNCTION THRESHOLDS


Camshaft Position Sensor Range Check:
Camshaft position sensor signal
No signal

Camshaft Position/Crankshaft Position Misalignment:
Camshaft position and crankshaft position phase
Mis-aligned

Camshaft Position Sensor Range Check (Chattering):
Camshaft position sensor voltage
Less than 0.3 V, or more than 4.7 V

Camshaft Position Sensor Range Check (Low voltage):
Camshaft position sensor voltage
Less than 0.3 V

Camshaft Position Sensor Range Check (High voltage):
Camshaft position sensor voltage
More than 4.7 V

VVT sensor range check (While starting engine):
VVT sensor signal
No signal

VVT sensor range check (After starting engine):
VVT sensor signal
No signal

VVT sensor range check (Chattering):
VVT sensor voltage
Less than 0.3 V, or more than 4.7 V

VVT sensor range check (Low voltage):
VVT sensor voltage
Less than 0.3 V

VVT sensor range check (High voltage):
VVT sensor voltage
More than 4.7 V

WIRING DIAGRAM

Refer to DTC P0335 (Click here).

INSPECTION PROCEDURE

HINT:
Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
1.CHECK ECM TERMINAL VOLTAGE
  1. Inspect the ECM using an oscilloscope.While the engine is idling, check the waveform of the ECM connector.OK:Tester ConnectionsSpecified ConditionsVV1+ (E6-19) - VV1- (E6-29)Correct waveform shownVV2+ (E6-18) - VV2- (E6-28)Correct waveform shownNE+ (E6-21) - NE- (E6-20)Correct waveform shown 4Runner

  2. Inspect the ECM using an oscilloscope.

    1. While the engine is idling, check the waveform of the ECM connector.

      OK:
      Tester Connections
      		Specified Conditions
      VV1+ (E6-19) - VV1- (E6-29)
      		Correct waveform shown
      VV2+ (E6-18) - VV2- (E6-28)
      		Correct waveform shown
      NE+ (E6-21) - NE- (E6-20)
      		Correct waveform shown


OKnext
REPLACE ECM
NG
next down

2.CHECK HARNESS AND CONNECTOR (VVT SENSOR - ECM)
  1. Disconnect the V3 or V4 VVT sensor connector. 4Runner

  2. Disconnect the V3 or V4 VVT sensor connector.

  1. Disconnect the E6 ECM connector.

  1. Measure the resistance.

    Standard resistance (Check for open):
    Tester Connections
    		Specified Conditions
    VVT sensor (V4-1) - VV1+ (E6-19)
    		Below 1 Ω
    VVT sensor (V3-1) - VV2+ (E6-18)
    		Below 1 Ω
    VVT sensor (V3 or V4-3) - NE- (E6-20)
    		Below 1 Ω
    Standard resistance (Check for short):
    Tester Connections
    		Specified Conditions
    VVT sensor (V4-1) or VV1+ (E6-19) - Body ground
    		10 kΩ or higher
    VVT sensor (V3-1) or VV2+ (E6-18) - Body ground
    		10 kΩ or higher
    VVT sensor (V3 or V4-3) or NE- (E6-20) - Body ground
    		10 kΩ or higher

  1. Reconnect the VVT sensor connector.

  1. Reconnect the ECM connector.



NGnext
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
next down

3.CHECK VVT SENSOR (SENSOR POWER SOURCE)
  1. Disconnect the V3 or V4 VVT sensor connector. 4Runner

  2. Disconnect the V3 or V4 VVT sensor connector.

  1. Measure the voltage between the terminals of the VVT sensor.

    Standard voltage:
    Tester Connections
    		Specified Conditions
    3 - Body ground
    		4.5 to 5.0 V

  1. Reconnect the VVT sensor connector.



NGnext
REPAIR OR REPLACE ECM
OK
next down

4.CHECK SENSOR INSTALLATION (VVT SENSOR)

  1. Check the VVT sensor installation.

    OK:
    Sensor is installed correctly.


NGnext
REPAIR OR REPLACE VVT SENSOR
OK
next down

5.CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF PLATE)

  1. Check the teeth of the signal plate.

    OK:
    Sensor plate teeth do not have any cracks or deformation.


NGnext
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY
OK
next down
REPLACE ECM